# Overlap vs Birthday Countdown

The clearest difference is in-app purchases: Overlap at none against Birthday Countdown's 6. Overlap also leads on device support (4 vs 2) and iOS requirement (15.0 vs 18.0). Birthday Countdown's advantage is update cadence (every 6 days vs every 3 months) and review sentiment (91% vs 67%). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Birthday Countdown sells 6 in-app purchases, starting at $4.99 per 7 days. Overlap asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Overlap against 4.7 for Birthday Countdown. Both are backed by a comparable volume of ratings — 880 and 698 respectively. Written reviews are what separate them: 67% of Overlap's written reviews are positive against 91% of Birthday Countdown's.

Overlap ships an update every 3 months, Birthday Countdown every 6 days. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Overlap | Birthday Countdown |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (880 ratings)](https://appshunter.io/ios/app/overlap-world-clock/id1516950324/reviews)** | [4.7 (698 ratings)](https://appshunter.io/ios/app/birthday-countdown-candlesup/id6744033985/reviews) |
| Number of ratings | **880** | 698 |
| Positive reviews | 67.3% of reviews | **91.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 71 MB | 76 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bonobo](https://appshunter.io/developer/666155611) | [Anton Pustovidko](https://appshunter.io/developer/1805645170) |

## What reviewers say

### Overlap

[App page](https://appshunter.io/ios/app/overlap-world-clock/id1516950324)

Easily find optimal meeting times across different time zones with a visual graph. Set custom availability for each location and sync with your calendar to avoid scheduling conflicts. Share convenient times directly from the app.

**Highlights:** Visual Overlap Graph for meeting times, Customizable availability hours per time zone, Calendar event integration, Multiple time zone display, Time zone renaming, Lock Screen Standby Mode widget

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Elegant and intuitive interface
- 🚀 Helpful for coordinating meetings across time zones
- 👍 Useful for tracking time differences globally
- 👍 Simple and easy to use
- 👍 Beautiful and sleek design

**What reviewers complain about**

- 🐛 Widget not working
- 🐛 Timezone data not always accurate
- 🐛 Duplicate timezone entries
- 🐛 App crashes and freezes
- 🔋 High CPU usage on Mac

**Reported bugs**

- Timezone data not updating correctly
- Inability to delete unwanted timezones
- Inconsistent behavior across platforms
- Typing issues on Mac version

**Requested features**

- Add option to reorder timezones
- Implement 24-hour clock display
- Allow customization of colors and backgrounds
- Integrate with calendar for scheduling
- Add weather information for each timezone


### Birthday Countdown

[App page](https://appshunter.io/ios/app/birthday-countdown-candlesup/id6744033985)

Never miss a special occasion with this birthday reminder and countdown app. Easily import contacts, track upcoming events, and receive personalized alerts. It offers gift suggestions and instant ways to send greetings, all within a privacy-focused design.

**Highlights:** Effortless birthday tracking, Countdown timer to events, Import birthdays from contacts, Personalized birthday profiles, Gift suggestions, Instant birthday wishes, iCloud sync

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Unlimited Yearly | $9.99 | per year |
| Unlimited Access | $29.99 | per year |
| Unlimited Access | $29.99 | one-time |
| Unlimited Access | $59.99 | one-time |

**What reviewers like**

- 👍 Helpful for remembering birthdays
- 👍 Imports contacts easily
- 👍 Satisfying countdown view
- 👍 Useful widget
- 👍 Lightweight app

**What reviewers complain about**

- 💰 Constant push for premium
- 💰 Premium required for basic functions
- 💰 Payment for yearly use is excessive
- 💰 Too many premium features
- 💰 Annoying in-app purchases

**Reported bugs**

- Bug preventing interaction without premium purchase
- Cannot exit premium page
- Friend's zodiac sign is incorrect
- Bug preventing birthday change initially

**Requested features**

- Allow adding children with gift wish lists
- Save gift ideas per person
- AI text generation for birthday messages
- Ability to set more than five notifications per birthday
- See zodiac sign without premium


## Frequently asked questions

### Is Overlap free?

Overlap is free to download, with no in-app purchases.

### Is Birthday Countdown free?

Birthday Countdown is free to download, with in-app purchases available.

### Which has better reviews, Overlap or Birthday Countdown?

Overlap is rated higher. Overlap averages 4.8 out of 5 from 880 ratings, while Birthday Countdown averages 4.7 from 698 ratings.

### Do Overlap or Birthday Countdown have ads?

Neither Overlap nor Birthday Countdown shows ads.

### Which is updated more often, Overlap or Birthday Countdown?

Overlap ships an update every 3 months, and Birthday Countdown every 6 days. Most recently, Overlap was updated on November 7, 2026 and Birthday Countdown on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*